package com.hongruan.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.hongruan.bean.Account;
import com.hongruan.common.Constants;

public class PageFilter implements Filter {

	public PageFilter() {
		// TODO Auto-generated constructor stub
	}

	
	public void destroy() {
		// TODO Auto-generated method stub

	}

	
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		HttpServletRequest req=(HttpServletRequest)request;
		HttpServletResponse res=(HttpServletResponse)response;
		HttpSession session=req.getSession();
		
		String indexPath = Constants.SYSTEM_PATH + "/index.jsp";
		
		if(indexPath.equals(req.getRequestURI())){
		    chain.doFilter(request, response);
		}else{
			Account account = (Account) session.getAttribute(Constants.SESSION_USER_KEY);
		   	
	    	if(account == null){
	    		res.sendRedirect(indexPath);
	    	}else{
			    chain.doFilter(request, response);
	    	}
		}
	}

	
	public void init(FilterConfig arg0) throws ServletException {
		// TODO Auto-generated method stub

	}

}
